Pioneer Electronic Corporation

Pioneer Corporation

Yoshinori Yamada

Kazuo Kobayashi

Kiyoshi Morikawa

Masanori Sugihara

Masakazu Kurumada

Yasuhiro Shinkai

Koji Asao

Takashi Komiyama

Akira Takahashi

Toshiyuki Kimura

Yoshio Aoyagi

Susumu Yoshida

Fumio Endo

Tetsuya Uchiyama

Akihiro Muto

Fuyuki Shirai

Shinji Nakayama

The feed mechanism has a lead screw , a pickup assembly , an engagement piece , and a restrictor piece , a compressed coil spring , and a bearing portion . The engagement piece has a thread portion engaged with a screw groove of the lead screw . The engagement piece moves along the lead screw and can come close to and off from the lead screw . The pickup assembly moves together with the engagement piece . The restrictor piece prevents the engagement piece from disengaging from the lead screw , except when the screw groove moves apart from the thread portion . The compressed coil spring urges the engagement piece toward the lead screw . The bearing portion rotatively supports the lead screw and allows the lead screw to move apart from the engagement piece when the engagement piece has reached an end thereof.

Pickup feed mechanism

Positioning means ( ) for positioning a recording medium at a predetermined position on a read mechanism of a device after the recording medium loaded into a loading opening ( ) has been transported to the read mechanism or a detector means for detecting that the recording medium has been positioned is provided pivotably about one end thereof inside the device. The positioning means ( ) comprises first positioning portion ( ) for positioning a recording medium of a smaller diameter and a second positioning portion ( ) for positioning a recording medium of a larger diameter. The detector means comprises a first detector member ( ) for contacting with the rim of the recording medium of the smaller diameter and a second detector member ( ) for contacting with the rim of the recording medium of the larger diameter. The device is adapted such that, when the recording medium of the larger diameter is transported, the first positioning portion ( ) or the first detector member ( ) is retreated from the transport passage for the recording medium of the larger diameter.

Recording medium read device

A clamping device consists of a disk table for setting thereon a disk-like recording medium bearing recorded information, and a clamper which cooperates with the disk table to hold the recording medium therebetween. At least one of the disk table and the damper is formed of polypropylene at where to contact with the recording medium. If a special disk, which has a high-temperature softening film on its label surface, is clamped under high temperature conditions for a long time, and the film softens and thereafter re-solidifies as the temperature lowers, a smooth release of the recording medium is attained.

Clamping device

A compact disk player has a polycarbonate turntable, and a clamper (201) for clamping a compact disk on the turn table. The turn table is made of the same material (polycarbonate) as the compact disk and includes a disk body, a central hub projected from the disk body to receive a center hole of a compact disk and a peripheral annular portion formed integrally with the disk body.

Polycarbonate turntable for a compact disk player

A vehicle disk player is disclosed in which a disk is inserted through a disk inserting opening, the disk is fixedly mounted on a turn table by a clamper arm when conveyed to a predetermined position in the player, the turn table is rotated for reproduction of data recorded in the disk, and reproducing means including the clamper arm and turn table are supported in a floating manner. The player is provided with a centering mechanism for positioning said disk at the middle of the disk inserting opening with centering pins. The centering pins are arranged out of the range of vibration of the disk which is fixedly mounted on said turn table supported in a floating manner.

Centering mechanism for automotive disk player

A disk playback apparatus with a centering mechanism for positioning a small or a large disk which comprises a support frame, a clamper arm swingably mounted on a rear portion of the support frame, and a centering mechanism for guiding large and a small diameter disks from a front side of the playback apparatus to a position between the support frame and the clamper arm when the disk is inserted into the playback apparatus. The centering mechanism has a pair of centering arms for contacting with a circumferential edge of the disk for positioning the disk in place, a centering lever provided in the clamper arm and connected to the pair of centering arms for simultaneously opening/closing the pair of centering arms, and lock arms each rotatably mounted on the associated centering arm for locking the centering arm independently, the lock arms allowing the pair of centering arms to be swingable when both the lock arms are released. This playback apparatus can center both the small and large size disks at a clamp position.

Disk playback apparatus with centering device for different disk sizes

A disc player is disclosed which includes a casing having a disc inserting opening, a turntable driven by a spindle motor, a clamper arm operating means for operating a clamper arm in cooperation with said turntable, a centering mechanism for guiding a disc from the disc inserting opening onto the turntable, the centering mechanism including a pair of centering arms (13, 14) each having at distal end portions contact portions which are to be brought into contact with a circumferential edge of the disc, the centering arms being pivotally movable at a predetermined distance in the disc inserting opening, a detecting lever (42) for detecting a condition that the disc is laid on the turntable, and a disc double insertion preventing lock linkage (43, 57) for preventing another disc from being inserted into the casing through the disc inserting opening when the first-mentioned disc is already located on the turntable, the double insertion preventing lock linkage being in cooperation with the centering mechanism.

Disc double insertion preventing mechanism for disc player

A vehicle disk player is disclosed in which a disk is inserted through a disk inserting opening, the disk is fixedly mounted on a turntable by a clamper arm when conveyed to a predetermined position in the player, the turntable is rotated for reproduction of data recorded in the disk, and reproducing means including the clamper arm and turntable are supported in a floating manner. The player is provided with a centering mechanism for positioning said disk at the middle of the disk inserting opening with centering pins. The centering pins are arranged out of the range of vibration of the disk which is fixedly mounted on said turntable supported in a floating manner. A centering lever (15) directly connects two centering arms (13 and 14).

A device for preventing the erroneous insertion of a disc in a vehicle CD player. A movable cover is swingably mounted on a frame through a movable cover opening and closing arm. An operating member is coupled to the movable cover opening and closing arm, the operating member being operated in association with a disc clamping operation of a clamper arm. After the clamper arm clamps the disc, the movable cover opening and closing arm is swung so that the movable cover is swung to a disc-inserting-opening closing position.

Device for preventing the erroneous insertion of a disc in a CD player

A disc player is disclosed which comprises a casing having a disc inserting opening, a turntable driven by a spindle motor, a clamper arm operating mechanism for operating a clamper arm in cooperation with said turntable, a centering mechanism for guiding a disc from the disc inserting opening onto the turntable, the centering mechanism including a pair of centering arms each having at distal end portions contact portions which are to be brought into contact with a circumferential edge of the disc, the centering arms being pivotally movable at a predetermined distance in the disc inserting opening, a detecting pin for detecting a condition that the disc is laid on the turntable; a separating mechanism for separating the pair of centering arms away from the circumferential edge of the disc when the disc is loaded on said turntable in cooperation with the clamper arm operating means. The mechanism is in cooperation with the centering mechanism whereby the disc is located outside of a vibration range of the disc.

Centering mechanism for automotive disc player

A disc reproducing apparatus is disclosed in which a disc is delivered from a disc inserting opening to a predetermined position within a player, a clamper arm that extends over a turntable for clamping the disc is operated to fix the disc on the turntable, and then the turntable is rotated to reproduce information recorded in the disc. A disc guide plate is pivotally mounted to the clamper arm such that the disc guide plate engages and disengages the clamper arm. A disc guiding recess into which a small-diameter disc can be fitted is provided to the disc guide plate. When the small-diameter disc is delivered, the small-diameter disc is fitted into the disc guiding recess to be aligned with a clamp position, and when a large-diameter disc is delivered, the large-diameter disc pushes the disc guide plate away to be aligned with the clamp position on the turntable.

Guide mechanism for disc reproducing apparatus

A disc reproducing apparatus is disclosed in which a large- or small-diameter disc inserted through a disc inserting opening is transferred to a predetermined position within a player, a clamper arm extending over a turntable on which the disc is placed is operated to fix the disc onto the turntable, and information recorded in the disc is reproduced by rotating the turntable. A pair of stopper arms are disposed on the clamper arm, each of which having an abutment which abuts the periphery of the disc. The pair of stopper arms are disposed such that when the small-diameter disc arrives at the predetermined position on the turntable, the angle made by the longitudinal axis of the respective stopper arms is smaller than the angle made by the radial lines connecting each stopper and the center of the small-diameter disc, but greater than the angle made by the radial lines connecting each stopper and the center of the large-diameter disc when the large-diameter disc is place.

A disc reproducing apparatus is disclosed in which a large or small disc inserted through a disc inserting opening is transferred to a predetermined position within a player, a clamper arm extending over a turntable on which the disc is placed is operated to fix the disc onto the turntable, and information recorded in the disc is reproduced by rotating the turntable. A disc guide plate for guiding the small-diameter disc to a clamp position is pivotally mounted to the clamper arm. A disc guiding recess is provided into which the small disc can slip and which has a sufficiently wide opening. A restraining member blocks the advancement of only the large disc into the disc guiding recess. When the small disc is inserted through the disc inserting opening, the small-diameter disc is advanced into the disc guiding recess to be positioned at the clamp position. When the large-diameter disc is inserted through the disc inserting opening, the large-diameter disc is guided by the restraining member to the outside of the disc guiding recess, pushes away the disc guide plate, and is guided to the clamp position on the turntable.

Disc guide mechanism for automotive disc player

An automatic loading disc player comprising a detection system for preventing mistaken insertion of a compact disc which is smaller than the conventional disc. The disc player comprises conveying rollers for conveying the disc to a disc playing position and returning the disc to a disc insertion position. The disc player further comprises a first detection means provided near the conveying rollers for detecting the presence or absence of a data recording disc, a second means for detecting when a data recording disc is loaded at the disc playing position, and a control means for controlling the driving of the conveying rollers in the forward or reverse direction, the control means operating to stop the driving of the conveying rollers in the forward direction when, in loading a data recording disc, the detection of the presence of the disc by the first detecting means is interrupted before the second detecting means detects the completion of loading of the disc.

Growing community of inventors

Saitama, Japan

Yoshinori Yamada